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Diffstat (limited to 'lib/msun/tests/fmaxmin_test.c')
| -rw-r--r-- | lib/msun/tests/fmaxmin_test.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/lib/msun/tests/fmaxmin_test.c b/lib/msun/tests/fmaxmin_test.c new file mode 100644 index 0000000..7ddcc87 --- /dev/null +++ b/lib/msun/tests/fmaxmin_test.c @@ -0,0 +1,136 @@ +/*- + * Copyright (c) 2008 David Schultz <das@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Tests for fmax{,f,l}() and fmin{,f,l}. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <fenv.h> +#include <float.h> +#include <math.h> +#include <stdio.h> + +#include "test-utils.h" + +#pragma STDC FENV_ACCESS ON + +/* + * Test whether func(x, y) has the expected result, and make sure no + * exceptions are raised. + */ +#define TEST(func, type, x, y, expected) do { \ + type __x = (x); /* convert before we clear exceptions */ \ + type __y = (y); \ + feclearexcept(ALL_STD_EXCEPT); \ + long double __result = func((__x), (__y)); \ + if (fetestexcept(ALL_STD_EXCEPT)) { \ + fprintf(stderr, #func "(%.20Lg, %.20Lg) raised 0x%x\n", \ + (x), (y), fetestexcept(FE_ALL_EXCEPT)); \ + ok = 0; \ + } \ + if (!fpequal(__result, (expected))) { \ + fprintf(stderr, #func "(%.20Lg, %.20Lg) = %.20Lg, " \ + "expected %.20Lg\n", (x), (y), __result, (expected)); \ + ok = 0; \ + } \ +} while (0) + +int +testall_r(long double big, long double small) +{ + int ok; + + long double expected_max = isnan(big) ? small : big; + long double expected_min = isnan(small) ? big : small; + ok = 1; + + TEST(fmaxf, float, big, small, expected_max); + TEST(fmaxf, float, small, big, expected_max); + TEST(fmax, double, big, small, expected_max); + TEST(fmax, double, small, big, expected_max); + TEST(fmaxl, long double, big, small, expected_max); + TEST(fmaxl, long double, small, big, expected_max); + TEST(fminf, float, big, small, expected_min); + TEST(fminf, float, small, big, expected_min); + TEST(fmin, double, big, small, expected_min); + TEST(fmin, double, small, big, expected_min); + TEST(fminl, long double, big, small, expected_min); + TEST(fminl, long double, small, big, expected_min); + + return (ok); +} + +/* + * Test all the functions: fmaxf, fmax, fmaxl, fminf, fmin, and fminl, + * in all rounding modes and with the arguments in different orders. + * The input 'big' must be >= 'small'. + */ +void +testall(int testnum, long double big, long double small) +{ + static const int rmodes[] = { + FE_TONEAREST, FE_UPWARD, FE_DOWNWARD, FE_TOWARDZERO + }; + int i; + + for (i = 0; i < 4; i++) { + fesetround(rmodes[i]); + if (!testall_r(big, small)) { + fprintf(stderr, "FAILURE in rounding mode %d\n", + rmodes[i]); + break; + } + } + printf("%sok %d - big = %.20Lg, small = %.20Lg\n", + (i == 4) ? "" : "not ", testnum, big, small); +} + +int +main(int argc, char *argv[]) +{ + + printf("1..12\n"); + + testall(1, 1.0, 0.0); + testall(2, 42.0, nextafterf(42.0, -INFINITY)); + testall(3, nextafterf(42.0, INFINITY), 42.0); + testall(4, -5.0, -5.0); + testall(5, -3.0, -4.0); + testall(6, 1.0, NAN); + testall(7, INFINITY, NAN); + testall(8, INFINITY, 1.0); + testall(9, -3.0, -INFINITY); + testall(10, 3.0, -INFINITY); + testall(11, NAN, NAN); + + /* This test isn't strictly required to work by C99. */ + testall(12, 0.0, -0.0); + + return (0); +} |
